Antenna



FIG. 1 is a front perspective view of an antenna showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front perspective view thereof, with the side panels in an alternative position;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken lines illustrate portions of the antenna which form no part of the claimed design. 

CLAIM The ornamental design for an antenna, as shown and described. 